请问，写控件的问题！

[zzy2740]

protected override void Render(HtmlTextWriter output)
{
output.Write("{0} {1} {2}","<H2>", "Welcome to Control Development!", "</H2>");
}

中的output.Write("{0} {1} {2}","<H2>", "Welcome to Control Development!", "</H2>");
是什么意思？不理解，里面这么多参数？？？

[hs_tang7788]

output.Write("{0} {1} {2}","<H2>", "Welcome to Control Development!", "</H2>");
{0}对应"<H2>",{1}对应"Welcome to Control Development!",{2}对应"</H2>"
其实就是用output输出<H2>Welcome to Control Development!</H2>

[LoveCherry]

012三个都是一个string的参数
HtmlTextWriter.Write的意思是将给定数据类型写入要呈现给 ASP.NET 页的 HTML 文本流。

[zzy2740]

楼上的，可以和我私聊吗？我的QQ：11212195

加我！！！

[AllenTing]

output.Write("{0} {1} {2}","<H2>", "Welcome to Control Development!", "</H2>");
意思就是第一二三个显示内容是"<H2>", "Welcome to Control Development!", "</H2>"
又因为"<H2>"是HTML标签，所以显示内容为Welcome to Control Development!，并且为H2字体